[PATCH V3] Makefile: Sort u-boot-initial-env output

Christoph Niedermaier cniedermaier at dh-electronics.com
Tue Mar 1 09:38:51 CET 2022

This will sort the default environment file generated by
"make u-boot-initial-env", but won't sort the default
environment in the compiled u-boot binary. The file
u-boot-initial-env is considered to use for the userpace
environment access tools [1] in case of that the
environments is written the first time into its location.
This is done on the one hand for a better overview and
comparison of the generated environment file. On the other
hand it is to synchronize the output with the script
get_default_env.sh, which generated a sorted default
environment file. The sorting preserves the order of equal
variable names by sorting only the variable name, and
disable the last-resort comparison. After sorting,
unnoticed blank lines at the end move to the top. Avoid
that by removing it before sorting.

[1] https://github.com/sbabic/libubootenv

Signed-off-by: Christoph Niedermaier <cniedermaier at dh-electronics.com>
Reviewed-by: Stefano Babic <sbabic at denx.de>
Tested-by: Stefano Babic <sbabic at denx.de>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Simon Glass <sjg at chromium.org>
Cc: Marek Behún <marek.behun at nic.cz>
To: u-boot at lists.denx.de
V2: - More detailed description of the patch in the commit message
V3: - Add forgotten tags
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index e6fc80aa6f..603747c3cc 100644
--- a/Makefile
+++ b/Makefile
@@ -2441,7 +2441,8 @@ endif
 quiet_cmd_genenv = GENENV  $@
 cmd_genenv = $(OBJCOPY) --dump-section .rodata.default_environment=$@ env/common.o; \
-	sed --in-place -e 's/\x00/\x0A/g' $@
+	sed --in-place -e 's/\x00/\x0A/g' $@; sed --in-place -e '/^\s*$$/d' $@; \
+	sort --field-separator== -k1,1 --stable $@ -o $@
 u-boot-initial-env: u-boot.bin
 	$(call if_changed,genenv)

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